Sand-trap.



W. H. WHITE.

SAND TRAP.

APPLICATION FILED FEBJQ. 1915."

1,164,899. Patented Dec.21,1915.

- in the sand is lodged by gravity from the. source of supply, from which it is forced through the feed tube to the track, the pres- I UNITED STATES PATENT QFFIQE,

WILLIAM. H. WHITE, 0F ROANOKE, VIRGINIA, ASSIGNOR. TO WHITE-AMERICAN LGC OMO'IIV E SANDER COMPANY, INC., OF ROANOKE, VIRGINIA, A CORPORATION OF VIRGINIA.

SAND-TRAP.

Application filed. February 19, 1915.

' To all whom it may concern:

This invention relates generally to an.

improvement in sanding devices for locomotives, and particularly to an element of such devices known as the sand-trap, whereent invention constituting an improvement upon that shown in my prior Patent No. 1,117,119, dated Nov. 10, 1914.

The main object of the present invention is the provision of a sand-trap in which the use of a nozzle having a check-valve or other elements liable to be clogged with sand is avoided, and in which a self-clearing nozzle of novel construction is employed.

A further object of the invention is the provision of a trap in which the sand channel is so formed as to prevent the gravity feed of the sand therethrough, while at the same time affording little obstruction to the movement of the sand underv the influence of the air blast.

A further object of the invention is the provision of a nozzle which, in addition to being self-clearing, may be removed to per- -mit the trap to be cleaned out, and which is designed to direct the air blast in such a manner as to secure a posltive feed of the sand, whlle avoiding an ob ectionable concentration and wearing action of the blast on the walls of the trap.

A further object of the invention is the utilization of an air blast operating through a portion of the trap and beyond the sand channel therein, which blast is utilized when necessary as a clean out medium for the feed tube beyond the trap, whereby said tube may be at, all times maintained in effective condition for the proper movement of the sand therethrough in sanding the track.

A further object of the invention is to provide a nozzle having a blast passageiof novel formation, serving as a means for temporar ly collecting and retarding or prevent- Specification of Letters Patent.

Patented Dec. 21, 1915.

Serial No. 9,395.

ing the backward feed of any sand particles which may lodge therein, and so that under the influence of the blast such parblast chamber.

The invention consists of the features of construction, combination and arrangement of parts herein fully described and claimed,

reference being had to the accompanying drawing in which Figure 1 is a vertical longitudinal section through asand-trap embodying my invention. Fig. 2 is a similar View of the headplug on an enlarged scale. Fig. 3 is a cross section on the line 33 of Fig. 2.

The improved trap, which aside from the details hereinafter described may be in any form, preferably comprises a T-shaped body 1 having an upright section 2 designed for connection to a suitable pipe leading from the source of supply, and a lateral section 3, the terminal of which is designed to be connected in any usual or preferred manner to the sanding or delivery tube 4 for the delivery of the material to the track. The body is interiorlyand longitudinally cored to provide what I term a sand channel 5,

ticles will be dislodged and forced into the the formed wall of this channel from a pointbe yond the upright of the body to a point a slight distance from the outlet end of the body being on a curved or inclined plane, as at 6, the curved or inclined portion of the channel forming a trap to prevent the travel of the sand through the channel by gravity or under the jars to which the body is subjected in the travel of the engine. The body 1 at approximately the juncture of theupright and lateral portions of the channel is cored and interiorly threaded at 7, and above the bore or opening 7 the upright portion 2 is provided with an interiorly threaded opening 8. These openings 7 and 8 are designed to provide a means whereby the sand channel may be cleaned out by any suitabletools, when such may become necessary, the opening 7 also serving for the reception of the blast nozzle, while the opening 8 may be closed in practice by a plug or other suitable closure. The blast nozzle 9 comprises a cylindrical body having at its inner end an angular head or flange 10 for the ap lication of a Wrench, and provided at such end with a.

threaded nipple 11 fitting within the threaded bore 7, said nipple being cored and in-- ternally threaded, as at'12, the axis of said core being arranged out of alinement with the axis of the nozzle body. The outer end of the nozzle is cored andinternally threaded as at 13, to receive the threaded body .14 of a coupling member 15, said coupling member beingtprovidedatits outer end with "an'angularhead for the application of a wrench. The threads-of the core 13' termi-- nate in rear of the inner end of a core,

which is flared or beveled to provide a bowlshaped blast chamber 17, centrally communicating with a blast bore or passage 18 extending axially through the nozzle body between the core 12 and chamber 17, the

' passage 18 being of the same diameter as the bore' or passage of a blast tube 19, disposed and mounted as hereinafter fully described;

blast is delivered through the coupling member ll from a supply pipe 20 connected therewith to supply air to the receiving chamber 17, from which chamber it passes to and through the bore 18, thence to and through the bore or passage of a blast head 21, and-finally through the blast tube 19,"

from, which it issues into the channel 5, thereby feeding the sand with a required pressure into the sanding or delivery tube 4. The blast head 21 comprises an externally threaded body or plug which fits within the core 12 and is provided with anangular outer end 22 for the application of a wrench,

. such end of the plug being internally cored and threaded for the reception of the threaded rear end of the nozzle 19. The plug 22 is formed with a blast channel or passage constituting a part of the blast passage of the nozzle as a whole, the said passage in the plug having an inlet portion 23 an outlet portion 24: and an intermediate portion 25. The inlet portion 23 of the plug, which is arranged parallel with and above the axis of the plug, communicates with the passage 18, While the delivery portion 24 of the passage in the plug communicates at its forward end with the blast tube 19 and at its rear end with the intermediate channel portion 25. The portion 25 of the plug channel forms a jog or offset between the receiving and delivery portions 23 and 24: of such channel, and forms therewith a channel of zigzag-shape, the delivery portion of which inclines at an angle forwardly I from a point below the axis of the plug and at its delivery end coincides with the axis of the plug'so as to be disposed substantially in longitudinal alinement with the bore of the blast tube 19, The intermediate portion 25 of the blast passage of the plug "channel is suitably closed at its upper end or aboveits point of intersection with the inlet end 23 at the point whereit opens through the top of the plug, it being understood that the portions of the passage are formed by drilling the plug atrthe required angles. The portions 23, 24: and 25of the :--plug passage are of uniform diameter, and it is evident that by reason of this shape of passage the portion'25 forms a trap to retard or prevent the backward passageof any particles of sand that may work back into the nozzle through the blast tube, so that they will be subsequently ejected by the blast toprevent clogging of the nozzle. While the irregular form of the passage may, under some conditions, slightly diminish the initialvelocity of the -blast, this is compensated for'and overcome by the compression of the air in striking the forward wall of the portion 25'and then reacting or expanding, by which its pressure is increased within the portion 25 to clear the same of any particles of sand and the blast then passes with slightly reduced velocity and a tendency to expansion through the portion 24; Theblast willthusbe caused to issue through the nozzle with a'proper volume and pressure proportioned to the diameter of the channel 5 to avoid objecof the trap or delivery tube will be etfectually avoided. A trap embodying my construction is accordingly adapted for long and continuous. service.

It will be observed that the nozzle 9 is 'devoid of check valves or other elements liable to clog and render the nozzle inoperative, the zigzag or irregular form of that portion of the discharge passage within the head or plug 21 tending to prevent the passage of particles of sand backward there 18 I from thejars'and vibrations incident to the travel of the engine, and the chamber 17 is therefore provided to receive and trap ticles of sand will work back into the bore these particles, as well as to serve as an ex-,

ment of these particles and a self-clearing action of the nozzle, whereby it is at all times maintained in operative condition, the

pansionchamberQ To effect the dislodgthreaded portion 14 of the coupling member 15 is formed to provide a blast rose or .induction nozzle 26 having an annular series of jet orifices 27. These orifices extend from the bore of said coupling member to the chamber 17, which is of relatively greater diameter than said bore, at an outward angle of inclination, whereby currents of air issuing from the jet orifices are adapted to strike the curved wall of the bowl and produce a whirl or vortex, whereby the entrapped sand is taken outby the whirling column of air and carried therewith through the nozzle into the chanrel 5. Any retention of sand particles in the chamber 17 is thus prevented and the nozzle kept clear without the use of valves or other extraneous devices which are liable to bind, clog or to be otherwise rendered inoperative by particles of sand. Upon removing the nozzle from the opening 7 the channel may be cleaned out throughsaid opening, as will be readily understood.

An auxiliary pressure channel 28 is formed in the body 1 and opens into the delivery end thereof beyond the delivery end of the sand channel 5, said pressure channel entering the body at a point adjacent its forward end, the entrance end 29 being internally threaded to receive the delivery end of a blast pipe 30, while the outlet 31 of said passage is interiorly threaded to receive the inlet end of a clearance blast tube 32which extends into the entrance end of the sanding or delivery tube 4. The tube at curves downwardly at its entrance end to dispose said tube at the properdelivery angle, and the tube 32 is similarly bent within the tube 4: so as to lie out of the path of the sand delivered into said tube 4 by the blast nozzle. Through the channel 28 and tube 32 a blast of air-may be delivered into the tube 4: to free said tube 4, whenever-- choked, from. accumulated material, as will be readily understood. g

It will be seen from the foregoing that v the present invention provides substantial improvements over my prior patented structure and obviates the necessityof employing a shelf overhanging the'delivery end of the nozzle and clearance channel or pocket beneath the delivery end of the nozzle, also the use of a check valve in the nozzle, while at the same time a free cleaning out of the sand channel whenever required may be conveniently effected. It will, of course, be understood that the nozzle may be mounted and locked for adjustment to dispose the delivery end of the nozzle to regulate the feeding effect of the blast on the sand, as in my aforesaid patented structure.

I claim a l. A sand trap formed with a sand channel, a blast pipe connected therewith, and a blast nozzle communicating with said channel, said nozzle being provided with a bore arranged at an angle to the axis of the channel and having inlet and delivery portions arranged out of alinement with each other but in parallel planes and an angular portion intersecting said inlet and delivery portions, said angular portion being approximately of V-form.

2. A sand trap formed with a sand channel, a blast pipe connected therewith, and a blast nozzle communicating with said channel, said nozzle having a bore inclined to the axis of the channel, said bore having inlet and delivery portions which are comparatively straight and extend in the same general direction as the channel and out of register but in parallel relation to each other, and a substantially V- shaped angular portion between the said inlet and delivery ends of the channel, the arms of said V-shape portion respectively communicating with-the inlet and delivery portions of the channel.

3. A sand trap formed with a sand channel, a blast pipe, and a nozzle comprising a body provided with an air inlet, a blast tube having a discharge bore, and a plug fitted in said body and receiving said tube, said plug being provided with a bore having portions communicating with the inlet passage in the cylindrical body and the bore of the blast tube, said passage being in part of V-form to provide a crooked portion in the length of the passage through the nozzle.

4. A sand trap having a sand channel,

and a blast nozzle provided with a passage WILLIAM H. WHITE.

Witnesses:

C. C. HINEs, BENNETT S. J ONES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

